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arXiv:0711.4363 (astro-ph)
[Submitted on 27 Nov 2007]

Title:Blue Compact Dwarf Galaxies with Spitzer: The Infrared/Radio Properties

Authors:Yanling Wu, V. Charmandaris, J.R. Houck, J.Bernard-Salas, V.Lebouteiller, B.R. Brandl, D. Farrah
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Abstract: We study the correlation between the radio, mid-infrared and far-infrared properties for a sample of 28 blue compact dwarf (BCD) and low metallicity star-forming galaxies observed by Spitzer. We find that these sources extend the same far-infrared to radio correlation typical of star forming late type alaxies to lower luminosities. In BCDs, the 24um (or 22um) mid-infrared to radio correlation is similar to starburst galaxies, though there is somewhat larger dispersion in their q_24 parameter compared to their q_FIR. No strong correlations between the q parameter and galaxy metallicity or effective dust temperature have been detected, though there is a hint of decreasing q_24 at low metallicities. The two lowest metallicity dwarfs in our sample, IZw18 and SBS0335-052E, despite their similar chemical abundance, deviate from the average q$_{24}$ ratio in opposite manners, displaying an apparent radio excess and dust excess respectively.
Comments: 8 pages, 4 figures, accepted by ApJ
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:0711.4363 [astro-ph]
  (or arXiv:0711.4363v1 [astro-ph] for this version)
  https://doi.org/10.48550/arXiv.0711.4363
Related DOI: https://doi.org/10.1086/527288

Submission history

From: Yanling Wu [view email]
[v1] Tue, 27 Nov 2007 21:24:03 UTC (47 KB)
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